JsonApiDocumentTopLevelNormalizerTest.php

<?php

namespace Drupal\Tests\jsonapi\Kernel\Normalizer;

use Drupal\Component\Serialization\Json;
use Drupal\Core\Cache\Cache;
use Drupal\Core\Cache\CacheableMetadata;
use Drupal\Core\Field\FieldStorageDefinitionInterface;
use Drupal\Core\Url;
use Drupal\file\Entity\File;
use Drupal\jsonapi\JsonApiResource\ErrorCollection;
use Drupal\jsonapi\JsonApiResource\LabelOnlyResourceObject;
use Drupal\jsonapi\JsonApiResource\LinkCollection;
use Drupal\jsonapi\JsonApiResource\NullIncludedData;
use Drupal\jsonapi\JsonApiResource\ResourceObject;
use Drupal\jsonapi\JsonApiResource\JsonApiDocumentTopLevel;
use Drupal\jsonapi\JsonApiResource\ResourceObjectData;
use Drupal\node\Entity\Node;
use Drupal\node\Entity\NodeType;
use Drupal\taxonomy\Entity\Term;
use Drupal\taxonomy\Entity\Vocabulary;
use Drupal\Tests\image\Kernel\ImageFieldCreationTrait;
use Drupal\Tests\jsonapi\Kernel\JsonapiKernelTestBase;
use Drupal\user\Entity\Role;
use Drupal\user\Entity\User;
use Drupal\user\RoleInterface;
use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;

/**
 * @coversDefaultClass \Drupal\jsonapi\Normalizer\JsonApiDocumentTopLevelNormalizer
 * @group jsonapi
 *
 * @internal
 */
class JsonApiDocumentTopLevelNormalizerTest extends JsonapiKernelTestBase {
    use ImageFieldCreationTrait;
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'jsonapi',
        'field',
        'node',
        'serialization',
        'system',
        'taxonomy',
        'text',
        'filter',
        'user',
        'file',
        'image',
        'jsonapi_test_normalizers_kernel',
        'jsonapi_test_resource_type_building',
    ];
    
    /**
     * A node to normalize.
     *
     * @var \Drupal\Core\Entity\EntityInterface
     */
    protected $node;
    
    /**
     * The node type.
     *
     * @var \Drupal\node\Entity\NodeType
     */
    protected $nodeType;
    
    /**
     * A user to normalize.
     *
     * @var \Drupal\user\Entity\User
     */
    protected $user;
    
    /**
     * A user.
     *
     * @var \Drupal\user\Entity\User
     */
    protected $user2;
    
    /**
     * A vocabulary.
     *
     * @var \Drupal\taxonomy\Entity\Vocabulary
     */
    protected $vocabulary;
    
    /**
     * A term.
     *
     * @var \Drupal\taxonomy\Entity\Term
     */
    protected $term1;
    
    /**
     * A term.
     *
     * @var \Drupal\taxonomy\Entity\Term
     */
    protected $term2;
    
    /**
     * The include resolver.
     *
     * @var \Drupal\jsonapi\IncludeResolver
     */
    protected $includeResolver;
    
    /**
     * The JSON:API resource type repository under test.
     *
     * @var \Drupal\jsonapi\ResourceType\ResourceTypeRepository
     */
    protected $resourceTypeRepository;
    
    /**
     * @var \Drupal\file\Entity\File
     */
    private $file;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        // Add the entity schemas.
        $this->installEntitySchema('node');
        $this->installEntitySchema('user');
        $this->installEntitySchema('taxonomy_term');
        $this->installEntitySchema('file');
        // Add the additional table schemas.
        $this->installSchema('system', [
            'sequences',
        ]);
        $this->installSchema('node', [
            'node_access',
        ]);
        $this->installSchema('user', [
            'users_data',
        ]);
        $this->installSchema('file', [
            'file_usage',
        ]);
        $type = NodeType::create([
            'type' => 'article',
        ]);
        $type->save();
        $this->createEntityReferenceField('node', 'article', 'field_tags', 'Tags', 'taxonomy_term', 'default', [
            'target_bundles' => [
                'tags',
            ],
        ], FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED);
        $this->createTextField('node', 'article', 'body', 'Body');
        $this->createImageField('field_image', 'article');
        $this->user = User::create([
            'name' => 'user1',
            'mail' => 'user@localhost',
        ]);
        $this->user2 = User::create([
            'name' => 'user2',
            'mail' => 'user2@localhost',
        ]);
        $this->user
            ->save();
        $this->user2
            ->save();
        $this->vocabulary = Vocabulary::create([
            'name' => 'Tags',
            'vid' => 'tags',
        ]);
        $this->vocabulary
            ->save();
        $this->term1 = Term::create([
            'name' => 'term1',
            'vid' => $this->vocabulary
                ->id(),
        ]);
        $this->term2 = Term::create([
            'name' => 'term2',
            'vid' => $this->vocabulary
                ->id(),
        ]);
        $this->term1
            ->save();
        $this->term2
            ->save();
        $this->file = File::create([
            'uri' => 'public://example.png',
            'filename' => 'example.png',
        ]);
        $this->file
            ->save();
        $this->node = Node::create([
            'title' => 'dummy_title',
            'type' => 'article',
            'uid' => $this->user,
            'body' => [
                'format' => 'plain_text',
                'value' => $this->randomStringValidate(42),
            ],
            'field_tags' => [
                [
                    'target_id' => $this->term1
                        ->id(),
                ],
                [
                    'target_id' => $this->term2
                        ->id(),
                ],
            ],
            'field_image' => [
                [
                    'target_id' => $this->file
                        ->id(),
                    'alt' => 'test alt',
                    'title' => 'test title',
                    'width' => 10,
                    'height' => 11,
                ],
            ],
        ]);
        $this->node
            ->save();
        $this->nodeType = NodeType::load('article');
        Role::create([
            'id' => RoleInterface::ANONYMOUS_ID,
            'permissions' => [
                'access content',
            ],
            'label' => 'Anonymous',
        ])->save();
        $this->includeResolver = $this->container
            ->get('jsonapi.include_resolver');
        $this->resourceTypeRepository = $this->container
            ->get('jsonapi.resource_type.repository');
    }
    
    /**
     * {@inheritdoc}
     */
    public function tearDown() : void {
        if ($this->node) {
            $this->node
                ->delete();
        }
        if ($this->term1) {
            $this->term1
                ->delete();
        }
        if ($this->term2) {
            $this->term2
                ->delete();
        }
        if ($this->vocabulary) {
            $this->vocabulary
                ->delete();
        }
        if ($this->user) {
            $this->user
                ->delete();
        }
        if ($this->user2) {
            $this->user2
                ->delete();
        }
    }
    
    /**
     * @covers ::normalize
     */
    public function testNormalize() {
        $resource_type = $this->container
            ->get('jsonapi.resource_type.repository')
            ->get('node', 'article');
        $resource_object = ResourceObject::createFromEntity($resource_type, $this->node);
        $includes = $this->includeResolver
            ->resolve($resource_object, 'uid,field_tags,field_image');
        $jsonapi_doc_object = $this->getNormalizer()
            ->normalize(new JsonApiDocumentTopLevel(new ResourceObjectData([
            $resource_object,
        ], 1), $includes, new LinkCollection([])), 'api_json', [
            'resource_type' => $resource_type,
            'account' => NULL,
            'sparse_fieldset' => [
                'node--article' => [
                    'title',
                    'node_type',
                    'uid',
                    'field_tags',
                    'field_image',
                ],
                'user--user' => [
                    'display_name',
                ],
            ],
            'include' => [
                'uid',
                'field_tags',
                'field_image',
            ],
        ]);
        $normalized = $jsonapi_doc_object->getNormalization();
        // @see http://jsonapi.org/format/#document-jsonapi-object
        $this->assertEquals('1.0', $normalized['jsonapi']['version']);
        $this->assertEquals('http://jsonapi.org/format/1.0/', $normalized['jsonapi']['meta']['links']['self']['href']);
        $this->assertSame($normalized['data']['attributes']['title'], 'dummy_title');
        $this->assertEquals($normalized['data']['id'], $this->node
            ->uuid());
        $this->assertSame([
            'data' => [
                'type' => 'node_type--node_type',
                'id' => NodeType::load('article')->uuid(),
                'meta' => [
                    'drupal_internal__target_id' => 'article',
                ],
            ],
            'links' => [
                'related' => [
                    'href' => Url::fromUri('internal:/jsonapi/node/article/' . $this->node
                        ->uuid() . '/node_type', [
                        'query' => [
                            'resourceVersion' => 'id:' . $this->node
                                ->getRevisionId(),
                        ],
                    ])
                        ->setAbsolute()
                        ->toString(TRUE)
                        ->getGeneratedUrl(),
                ],
                'self' => [
                    'href' => Url::fromUri('internal:/jsonapi/node/article/' . $this->node
                        ->uuid() . '/relationships/node_type', [
                        'query' => [
                            'resourceVersion' => 'id:' . $this->node
                                ->getRevisionId(),
                        ],
                    ])
                        ->setAbsolute()
                        ->toString(TRUE)
                        ->getGeneratedUrl(),
                ],
            ],
        ], $normalized['data']['relationships']['node_type']);
        $this->assertTrue(!isset($normalized['data']['attributes']['created']));
        $this->assertEquals([
            'alt' => 'test alt',
            'title' => 'test title',
            'width' => 10,
            'height' => 11,
            'drupal_internal__target_id' => $this->file
                ->id(),
        ], $normalized['data']['relationships']['field_image']['data']['meta']);
        $this->assertSame('node--article', $normalized['data']['type']);
        $this->assertEquals([
            'data' => [
                'type' => 'user--user',
                'id' => $this->user
                    ->uuid(),
                'meta' => [
                    'drupal_internal__target_id' => $this->user
                        ->id(),
                ],
            ],
            'links' => [
                'self' => [
                    'href' => Url::fromUri('internal:/jsonapi/node/article/' . $this->node
                        ->uuid() . '/relationships/uid', [
                        'query' => [
                            'resourceVersion' => 'id:' . $this->node
                                ->getRevisionId(),
                        ],
                    ])
                        ->setAbsolute()
                        ->toString(TRUE)
                        ->getGeneratedUrl(),
                ],
                'related' => [
                    'href' => Url::fromUri('internal:/jsonapi/node/article/' . $this->node
                        ->uuid() . '/uid', [
                        'query' => [
                            'resourceVersion' => 'id:' . $this->node
                                ->getRevisionId(),
                        ],
                    ])
                        ->setAbsolute()
                        ->toString(TRUE)
                        ->getGeneratedUrl(),
                ],
            ],
        ], $normalized['data']['relationships']['uid']);
        $this->assertArrayNotHasKey('meta', $normalized);
        $this->assertSame($this->user
            ->uuid(), $normalized['included'][0]['id']);
        $this->assertSame('user--user', $normalized['included'][0]['type']);
        $this->assertSame('user1', $normalized['included'][0]['attributes']['display_name']);
        $this->assertCount(1, $normalized['included'][0]['attributes']);
        $this->assertSame($this->term1
            ->uuid(), $normalized['included'][1]['id']);
        $this->assertSame('taxonomy_term--tags', $normalized['included'][1]['type']);
        $this->assertSame($this->term1
            ->label(), $normalized['included'][1]['attributes']['name']);
        $this->assertCount(12, $normalized['included'][1]['attributes']);
        $this->assertTrue(!isset($normalized['included'][1]['attributes']['created']));
        // Make sure that the cache tags for the includes and the requested entities
        // are bubbling as expected.
        $this->assertEqualsCanonicalizing([
            'file:1',
            'node:1',
            'taxonomy_term:1',
            'taxonomy_term:2',
            'user:1',
        ], $jsonapi_doc_object->getCacheTags());
        $this->assertSame(Cache::PERMANENT, $jsonapi_doc_object->getCacheMaxAge());
    }
    
    /**
     * @covers ::normalize
     */
    public function testNormalizeUuid() {
        $resource_type = $this->container
            ->get('jsonapi.resource_type.repository')
            ->get('node', 'article');
        $resource_object = ResourceObject::createFromEntity($resource_type, $this->node);
        $include_param = 'uid,field_tags';
        $includes = $this->includeResolver
            ->resolve($resource_object, $include_param);
        $document_wrapper = new JsonApiDocumentTopLevel(new ResourceObjectData([
            $resource_object,
        ], 1), $includes, new LinkCollection([]));
        $jsonapi_doc_object = $this->getNormalizer()
            ->normalize($document_wrapper, 'api_json', [
            'resource_type' => $resource_type,
            'account' => NULL,
            'include' => [
                'uid',
                'field_tags',
            ],
        ]);
        $normalized = $jsonapi_doc_object->getNormalization();
        $this->assertStringMatchesFormat($this->node
            ->uuid(), $normalized['data']['id']);
        $this->assertEquals($this->node->type->entity
            ->uuid(), $normalized['data']['relationships']['node_type']['data']['id']);
        $this->assertEquals($this->user
            ->uuid(), $normalized['data']['relationships']['uid']['data']['id']);
        $this->assertNotEmpty($normalized['included'][0]['id']);
        $this->assertArrayNotHasKey('meta', $normalized);
        $this->assertEquals($this->user
            ->uuid(), $normalized['included'][0]['id']);
        $this->assertCount(1, $normalized['included'][0]['attributes']);
        $this->assertCount(12, $normalized['included'][1]['attributes']);
        // Make sure that the cache tags for the includes and the requested entities
        // are bubbling as expected.
        $this->assertEqualsCanonicalizing([
            'node:1',
            'taxonomy_term:1',
            'taxonomy_term:2',
            'user:1',
        ], $jsonapi_doc_object->getCacheTags());
    }
    
    /**
     * @covers ::normalize
     */
    public function testNormalizeException() {
        $normalized = $this->container
            ->get('jsonapi.serializer')
            ->normalize(new JsonApiDocumentTopLevel(new ErrorCollection([
            new BadRequestHttpException('Lorem'),
        ]), new NullIncludedData(), new LinkCollection([])), 'api_json', [])
            ->getNormalization();
        $this->assertNotEmpty($normalized['errors']);
        $this->assertArrayNotHasKey('data', $normalized);
        $this->assertEquals(400, $normalized['errors'][0]['status']);
        $this->assertEquals('Lorem', $normalized['errors'][0]['detail']);
        $this->assertEquals([
            'info' => [
                'href' => 'http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10.4.1',
            ],
            'via' => [
                'href' => 'http://localhost/',
            ],
        ], $normalized['errors'][0]['links']);
    }
    
    /**
     * Tests the message and exceptions when requesting a Label only resource.
     */
    public function testAliasFieldRouteException() {
        $this->assertSame('uid', $this->resourceTypeRepository
            ->getByTypeName('node--article')
            ->getPublicName('uid'));
        $this->assertSame('roles', $this->resourceTypeRepository
            ->getByTypeName('user--user')
            ->getPublicName('roles'));
        $resource_type_field_aliases = [
            'node--article' => [
                'uid' => 'author',
            ],
            'user--user' => [
                'roles' => 'user_roles',
            ],
        ];
        \Drupal::state()->set('jsonapi_test_resource_type_builder.resource_type_field_aliases', $resource_type_field_aliases);
        Cache::invalidateTags([
            'jsonapi_resource_types',
        ]);
        $this->assertSame('author', $this->resourceTypeRepository
            ->getByTypeName('node--article')
            ->getPublicName('uid'));
        $this->assertSame('user_roles', $this->resourceTypeRepository
            ->getByTypeName('user--user')
            ->getPublicName('roles'));
        // Create the request to fetch the articles and fetch included user.
        $resource_type = $this->container
            ->get('jsonapi.resource_type.repository')
            ->get('node', 'article');
        $user = User::load($this->node
            ->getOwnerId());
        $resource_object = ResourceObject::createFromEntity($resource_type, $this->node);
        $user_resource_type = $this->container
            ->get('jsonapi.resource_type.repository')
            ->get('user', 'user');
        $resource_object_user = LabelOnlyResourceObject::createFromEntity($user_resource_type, $user);
        $includes = $this->includeResolver
            ->resolve($resource_object_user, 'user_roles');
        
        /** @var \Drupal\jsonapi\Normalizer\Value\CacheableNormalization $jsonapi_doc_object */
        $jsonapi_doc_object = $this->getNormalizer()
            ->normalize(new JsonApiDocumentTopLevel(new ResourceObjectData([
            $resource_object,
            $resource_object_user,
        ], 2), $includes, new LinkCollection([])), 'api_json', [
            'resource_type' => $resource_type,
            'account' => NULL,
            'sparse_fieldset' => [
                'node--article' => [
                    'title',
                    'node_type',
                    'uid',
                ],
                'user--user' => [
                    'user_roles',
                ],
            ],
            'include' => [
                'user_roles',
            ],
        ])
            ->getNormalization();
        $this->assertNotEmpty($jsonapi_doc_object['meta']['omitted']);
        foreach ($jsonapi_doc_object['meta']['omitted']['links'] as $key => $link) {
            if (strpos($key, 'item--') === 0) {
                // Ensure that resource link contains url with the alias field.
                $resource_link = Url::fromUri('internal:/jsonapi/user/user/' . $user->uuid() . '/user_roles')
                    ->setAbsolute()
                    ->toString(TRUE);
                $this->assertEquals($resource_link->getGeneratedUrl(), $link['href']);
                $this->assertEquals("The current user is not allowed to view this relationship. The user only has authorization for the 'view label' operation.", $link['meta']['detail']);
            }
        }
    }
    
    /**
     * @covers ::normalize
     */
    public function testNormalizeConfig() {
        $resource_type = $this->container
            ->get('jsonapi.resource_type.repository')
            ->get('node_type', 'node_type');
        $resource_object = ResourceObject::createFromEntity($resource_type, $this->nodeType);
        $document_wrapper = new JsonApiDocumentTopLevel(new ResourceObjectData([
            $resource_object,
        ], 1), new NullIncludedData(), new LinkCollection([]));
        $jsonapi_doc_object = $this->getNormalizer()
            ->normalize($document_wrapper, 'api_json', [
            'resource_type' => $resource_type,
            'account' => NULL,
            'sparse_fieldset' => [
                'node_type--node_type' => [
                    'description',
                    'display_submitted',
                ],
            ],
        ]);
        $normalized = $jsonapi_doc_object->getNormalization();
        $this->assertSame([
            'description',
            'display_submitted',
        ], array_keys($normalized['data']['attributes']));
        $this->assertSame($normalized['data']['id'], NodeType::load('article')->uuid());
        $this->assertSame($normalized['data']['type'], 'node_type--node_type');
        // Make sure that the cache tags for the includes and the requested entities
        // are bubbling as expected.
        $this->assertSame([
            'config:node.type.article',
        ], $jsonapi_doc_object->getCacheTags());
    }
    
    /**
     * Try to POST a node and check if it exists afterwards.
     *
     * @covers ::denormalize
     */
    public function testDenormalize() {
        $payload = '{"data":{"type":"article","attributes":{"title":"Testing article"}}}';
        $resource_type = $this->container
            ->get('jsonapi.resource_type.repository')
            ->get('node', 'article');
        $node = $this->getNormalizer()
            ->denormalize(Json::decode($payload), NULL, 'api_json', [
            'resource_type' => $resource_type,
        ]);
        $this->assertInstanceOf(Node::class, $node);
        $this->assertSame('Testing article', $node->getTitle());
    }
    
    /**
     * Try to POST a node and check if it exists afterwards.
     *
     * @covers ::denormalize
     */
    public function testDenormalizeUuid() {
        $configurations = [
            // Good data.
[
                [
                    [
                        $this->term2
                            ->uuid(),
                        $this->term1
                            ->uuid(),
                    ],
                    $this->user2
                        ->uuid(),
                ],
                [
                    [
                        $this->term2
                            ->id(),
                        $this->term1
                            ->id(),
                    ],
                    $this->user2
                        ->id(),
                ],
            ],
            // Good data, without any tags.
[
                [
                    [],
                    $this->user2
                        ->uuid(),
                ],
                [
                    [],
                    $this->user2
                        ->id(),
                ],
            ],
            // Bad data in first tag.
[
                [
                    [
                        'invalid-uuid',
                        $this->term1
                            ->uuid(),
                    ],
                    $this->user2
                        ->uuid(),
                ],
                [
                    [
                        $this->term1
                            ->id(),
                    ],
                    $this->user2
                        ->id(),
                ],
                'taxonomy_term--tags:invalid-uuid',
            ],
            // Bad data in user and first tag.
[
                [
                    [
                        'invalid-uuid',
                        $this->term1
                            ->uuid(),
                    ],
                    'also-invalid-uuid',
                ],
                [
                    [
                        $this->term1
                            ->id(),
                    ],
                    NULL,
                ],
                'user--user:also-invalid-uuid',
            ],
        ];
        foreach ($configurations as $configuration) {
            [
                $payload_data,
                $expected,
            ] = $this->denormalizeUuidProviderBuilder($configuration);
            $payload = Json::encode($payload_data);
            $resource_type = $this->container
                ->get('jsonapi.resource_type.repository')
                ->get('node', 'article');
            try {
                $node = $this->getNormalizer()
                    ->denormalize(Json::decode($payload), NULL, 'api_json', [
                    'resource_type' => $resource_type,
                ]);
            } catch (NotFoundHttpException $e) {
                $non_existing_resource_identifier = $configuration[2];
                $this->assertEquals("The resource identified by `{$non_existing_resource_identifier}` (given as a relationship item) could not be found.", $e->getMessage());
                continue;
            }
            
            /** @var \Drupal\node\Entity\Node $node */
            $this->assertInstanceOf(Node::class, $node);
            $this->assertSame('Testing article', $node->getTitle());
            if (!empty($expected['user_id'])) {
                $owner = $node->getOwner();
                $this->assertEquals($expected['user_id'], $owner->id());
            }
            $tags = $node->get('field_tags')
                ->getValue();
            if (!empty($expected['tag_ids'][0])) {
                $this->assertEquals($expected['tag_ids'][0], $tags[0]['target_id']);
            }
            else {
                $this->assertArrayNotHasKey(0, $tags);
            }
            if (!empty($expected['tag_ids'][1])) {
                $this->assertEquals($expected['tag_ids'][1], $tags[1]['target_id']);
            }
            else {
                $this->assertArrayNotHasKey(1, $tags);
            }
        }
    }
    
    /**
     * Tests denormalization for related resources with missing or invalid types.
     */
    public function testDenormalizeInvalidTypeAndNoType() {
        $payload_data = [
            'data' => [
                'type' => 'node--article',
                'attributes' => [
                    'title' => 'Testing article',
                    'id' => '33095485-70D2-4E51-A309-535CC5BC0115',
                ],
                'relationships' => [
                    'uid' => [
                        'data' => [
                            'type' => 'user--user',
                            'id' => $this->user2
                                ->uuid(),
                        ],
                    ],
                    'field_tags' => [
                        'data' => [
                            [
                                'type' => 'foobar',
                                'id' => $this->term1
                                    ->uuid(),
                            ],
                        ],
                    ],
                ],
            ],
        ];
        // Test relationship member with invalid type.
        $payload = Json::encode($payload_data);
        $resource_type = $this->container
            ->get('jsonapi.resource_type.repository')
            ->get('node', 'article');
        try {
            $this->getNormalizer()
                ->denormalize(Json::decode($payload), NULL, 'api_json', [
                'resource_type' => $resource_type,
            ]);
            $this->fail('No assertion thrown for invalid type');
        } catch (BadRequestHttpException $e) {
            $this->assertEquals("Invalid type specified for related resource: 'foobar'", $e->getMessage());
        }
        // Test relationship member with no type.
        unset($payload_data['data']['relationships']['field_tags']['data'][0]['type']);
        $payload = Json::encode($payload_data);
        $resource_type = $this->container
            ->get('jsonapi.resource_type.repository')
            ->get('node', 'article');
        try {
            $this->container
                ->get('jsonapi_test_normalizers_kernel.jsonapi_document_toplevel')
                ->denormalize(Json::decode($payload), NULL, 'api_json', [
                'resource_type' => $resource_type,
            ]);
            $this->fail('No assertion thrown for missing type');
        } catch (BadRequestHttpException $e) {
            $this->assertEquals("No type specified for related resource", $e->getMessage());
        }
    }
    
    /**
     * We cannot use a PHPUnit data provider because our data depends on $this.
     *
     * @param array $options
     *   Options for how to construct test data.
     *
     * @return array
     *   The test data.
     */
    protected function denormalizeUuidProviderBuilder(array $options) {
        [
            $input,
            $expected,
        ] = $options;
        [
            $input_tag_uuids,
            $input_user_uuid,
        ] = $input;
        [
            $expected_tag_ids,
            $expected_user_id,
        ] = $expected;
        $node = [
            [
                'data' => [
                    'type' => 'node--article',
                    'attributes' => [
                        'title' => 'Testing article',
                    ],
                    'relationships' => [
                        'uid' => [
                            'data' => [
                                'type' => 'user--user',
                                'id' => $input_user_uuid,
                            ],
                        ],
                        'field_tags' => [
                            'data' => [],
                        ],
                    ],
                ],
            ],
            [
                'tag_ids' => $expected_tag_ids,
                'user_id' => $expected_user_id,
            ],
        ];
        if (isset($input_tag_uuids[0])) {
            $node[0]['data']['relationships']['field_tags']['data'][0] = [
                'type' => 'taxonomy_term--tags',
                'id' => $input_tag_uuids[0],
            ];
        }
        if (isset($input_tag_uuids[1])) {
            $node[0]['data']['relationships']['field_tags']['data'][1] = [
                'type' => 'taxonomy_term--tags',
                'id' => $input_tag_uuids[1],
            ];
        }
        return $node;
    }
    
    /**
     * Ensure that cacheability metadata is properly added.
     *
     * @param \Drupal\Core\Cache\CacheableMetadata $expected_metadata
     *   The expected cacheable metadata.
     *
     * @dataProvider testCacheableMetadataProvider
     */
    public function testCacheableMetadata(CacheableMetadata $expected_metadata) {
        $resource_type = $this->container
            ->get('jsonapi.resource_type.repository')
            ->get('node', 'article');
        $resource_object = ResourceObject::createFromEntity($resource_type, $this->node);
        $context = [
            'resource_type' => $resource_type,
            'account' => NULL,
        ];
        $jsonapi_doc_object = $this->getNormalizer()
            ->normalize(new JsonApiDocumentTopLevel(new ResourceObjectData([
            $resource_object,
        ], 1), new NullIncludedData(), new LinkCollection([])), 'api_json', $context);
        foreach ($expected_metadata->getCacheTags() as $tag) {
            $this->assertContains($tag, $jsonapi_doc_object->getCacheTags());
        }
        foreach ($expected_metadata->getCacheContexts() as $context) {
            $this->assertContains($context, $jsonapi_doc_object->getCacheContexts());
        }
        $this->assertSame($expected_metadata->getCacheMaxAge(), $jsonapi_doc_object->getCacheMaxAge());
    }
    
    /**
     * Provides test cases for asserting cacheable metadata behavior.
     */
    public function testCacheableMetadataProvider() {
        $cacheable_metadata = function ($metadata) {
            return CacheableMetadata::createFromRenderArray([
                '#cache' => $metadata,
            ]);
        };
        return [
            [
                $cacheable_metadata([
                    'contexts' => [
                        'languages:language_interface',
                    ],
                ]),
                [
                    'node--article' => 'body',
                ],
            ],
        ];
    }
    
    /**
     * Helper to load the normalizer.
     */
    protected function getNormalizer() {
        $normalizer_service = $this->container
            ->get('jsonapi_test_normalizers_kernel.jsonapi_document_toplevel');
        // Simulate what happens when this normalizer service is used via the
        // serializer service, as it is meant to be used.
        $normalizer_service->setSerializer($this->container
            ->get('jsonapi.serializer'));
        return $normalizer_service;
    }

}